Dovetailed stave for barrels and casks



July 10,1928. 1,676,319

. E. A. BOLINDER DOVE TAILED STAVE FOR BARRELS AND CASKS Filed Au 21,1925 Fig.- 1

' toward the one end of the stave.-

Patented July 10, 1928.

ERIK AUGUST BOLINDER,

or STOCKHOLM, SW DEN.

DOVETAILED STAVE FOR B RRELs Ann cAsKs.

Application filed August 21, 1925, Serial No. 51,715, and in SwedenAugust 21,1924.

In assembling barrels and casks having dove-tailed staves the assemblingmust be eifected so that parts of the joint having a dove-tailed crosssection are slid onto each I other in the longitudinal directionthereof. This sliding together of the staves generally brings aboutgreat friction between the parts of the joint, and, in fact,theresistance 'produced may be so appreciable that the parts '01": thejoint are caused to break.

The present invention has for its purpose to obviate this drawback, andthe invention is principally characterized by the fact that the width ofthe parts of the joint decreases The accompanying drawing illustratesthe arrangement as applied onto a curved stave intended for bulgedbarrels and casks. Fig.

- 1 shows the stave in an edgewise view, and

' Fig. 2 is a cross sectional View thereof.

The edges of the partsl and 2 of the joint do not parallel each otherbut are at one end of the stavesituated at a greater distance from oneanother than at the other 5 end of the stave,that is to say, they are ofa wedge-like shape. This arrangement fa-V cilitates sliding the parts ofthe joint onto each other along the major portion of their length,without any appreciable friction or breaking strains being producedthereby, which, on the ot-her hand', will be the" case if the edges ofthe parts of the joint parallel.

one another. Only after the wedge-shaped 1 parts of the joint have beenslid onto each other along the major portion oft-heir length will theresistance be produced which is then overcome by-driving the stavesforci bly together in the longitudinal direction. By reason of the crosssectional outline of the parts of the joint the said forcible drivingtogether of the staves will cause so powerful a wedge actionin the transyersal direction of the staves that the latter will be pulled tightlyonto each other.

What I claim as new and desire to secureby Letters Patent of the UnitedStates of America is: I A dove-tailed 'stavejfo-r producing barrels andcasks, characterized by the fact that the I parts of the stave jointsdecrease in width.

along the stave,'from the one end of thestave toward the other-,for thepurpose of facilitating the slidingof the parts of the joint together.

' In testimony whereofI aliix my signature I ERIK AUGUST BOLINDER.

